Grinder structure.



Patented June 22,, K9115.

5 SHEETS-SHEET I.

A. L DE LEEUWu GRiNDER STRUCTURE.

APPLICATION men MAY 28. 1912.

Patentedvluna 22, $35.

5 SHEETS-SHEET 2.

Memo

A. L. DE LEEUW. GRIN-DER STRUCTURE- APPLICATION 'mzn Min/28,1913.

Patented June 1915,

5 SHEETS-SHEET 4.

A. L. DE LEEUW.

GRINDER STRUCTURE- APPLICATION mzn MAY 28. I913.

Patented June 22, 1915.

5 SHEETS-SHEET! wirliueooao ADOLPH L. DE LEEUW, F CINCINNATI, OI-IIO, ASSIG-NOIt TO THE CINCINNATI MILLING i I M o MACHINE COMPANY, OF CINCINNATI, OHIO, CORPORATION OF OHIO.

inaaeei.

GRINDER STRUCTURE.

Specification of Letters latenti Patented June 22, 1915.

Application fiIed'May 28, 1913. Serial No. 770,494

Ton ll whom it concern: v

Be it known that I, ADOLPH L. -DE LnEUw, a

citizen of the United States, and residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and Improved-Grinder Structure, of which the.

' following Specification is. a full disclosure.'

This invention relates to mechanism forenabling work to be accurately tooled, and

it is more especiallyconcerned with that type of machine tools known as grinders, and it proposes certain structural characteristics promoting rigidity, as well as enhancing the lib facility with which the instrumentality may be manipulated.

One object wit iin the contemplation of f this}; invention is t devise a grinder in which a knee will be vertically grinding wheel column an which" will in turn carry a saddle and over ying table, and in which the longitudinal movement of the aldjustable on a l iljsle may be produced by the actuations of 1 a lever horizontally extending from a bracket depending from the saddle in'unitary relation therewith.

Another object; is; to render available a structure and various attachments therefor serving to promote the facility withwhich allsorts of grinding work may be accomplished especially for the purpose of accura-tely grinding gear cutters along radialplanes, or grinding the peripheral tips of ordinary cutters at the proper clearance angle.

A further-object is'to create a rugged and structurally stiff machine applicable with especial advantage for the purpose of grind ing work, and which will maintain all usual control features permitting the work to be brought into or out of contact with a the grinder'by the movement of ones legs and at the same time enabling the attendant to have the free use of both'hands for controlling the position of Y the work in its holder or with relation to the tooth rest.

Other objects will be in part obvious from the annexed drawings and in part indicated in connection therewith by the following analysis of thisinvention.

This. invention accordingly consists in the features of construction, combination of parts and in the unique relations of the members and in the relative proportioning and disposition thereofg'all as more completely outlined herein. I

and-the like. Thus, at -2 .and"3- are fa'e ets' I To enable others skilled in the art so fully to comprehend the underlying features thereof that they may embody the same by the numerous modifications in structure and relation contemplated by this invention, drawings depicting a preferred form have been annexed as a part'of this disclosure, and in such drawings, like characters of reference denote 'correspondingparts throughout all the views, of which Figure -1 is an elevation partly in section showing features of this mechanism, together with details of the means for operating the table, by the action of the legs leaving the hands free.,to manipulate the work. Fig. 2 is an end elevation partly in section showing further details of the grinding-wheel support, the reciprocating table,

and the depending bracket or housing at the end of the saddle and at the side of the knee. Fig. 3'. is a plan with the grinding head removed showing further relations of the parts, F ig. 4 is a detail showing the details of the construction. Fig. 8 is-a vertical axial section through the index or swivel head. Fig. 9 is a perspective of the machine.

Continuing now by way of a more de-.

tailed description, itwill be noted that this organization comprises a standard or column A, the top of which carries the grinding wheel, and supported by this column are the parts that carry the work and enable it to be brought into any predetermined relation with the grinding'whe'el. In this instance the column A is cylindrical in form so as to permit of vertical as well as pivotal movements of the supported features, and retained on its upper end. is the head B in which is journaled the spindle l of the grinding wheel. This headis preferably shaped and constructed in sucha manner that it enables the tooth rest ofmy copending application Serial No. 770170 .filed May 27, 1913, to be secured to the same in various positions for producing spiral work having screw-tln'eaded holes adapted to receive bolts to enable the tooth rest tobe secured thereto. The particular construction of this head may of course be varied from that shown in the drawings.

I 'A knee C is vertically movable on the cylindrical shell 4 of the column A and it is prevented from turning with respect to the shell by means of a spline roller 5 (see Figs.

3 and?) and its vertical elevation is secured by means of a rack 6 with which meshes a pinion? at the end of the shaft 8.

'This roller 5 is conical in form and it con verges into a channel 50 cut into the periphery of the tubular sleeve 4 in parallelism .with the axis thereof. This conical roller 5 is positioned by a pin 51 which is adjustably retained in the knee by the ciprocation of the table may be preserved in parallelism .with the axis of the grinding wheel.

' A'worm wheel 9 actuated by a worm 11 on I the end of the. shaft 10 enables the hand wheel 12'to raise and lower the knee C. The

upper surface or, table of the knee is provided with a-horizonta-l'guide' way 13 8X-' tending radiallywith respect to thepost or column.

, column. b-This saddle provides a slide-way f14extending transversely to the sl1de-way 40 Upon this knee C and slidably inter-fitting with the guide way 13 thereof is a saddle D supportinggeertain features-for enabling it tojbe ihoved toward and- .away from the 13 on the saddle, and preferably it provides legs 15 -and'16 which straddle the column and cover-the slides of the knee. At 'one side, the saddle provides an overhanging part 17 from which depends a bracket 18 f1 Lrigidly secured thereto by means of screws 19.; At its loiver end this bracket has clamped thereto a casing or gearbox 20 which may be swung around and clamped in any desir'ed fixed angular relation with the depending. bracket by means of the clamp screw 21. A pivot post 22 is provided by this box 20fand journaled thereon is a gear segment 23 which meshes with a pinion -24.at"the end of a vertical shaft 25 which is 5 journaled in the bracket 18 and carries a gear--26- at its'upperend engaging with a rack 27 whereby a table may be recrprocated.

A lever 28 is secured to the gear segment 23 and extends horizontally and terminates in an roperating end 29 adapted to pass between the legs of the attendant so that by moving his knees he may cause the table to reciprocate.

Thetable E preferably comprises a lower member 30 which slides in the transverse guidev provided by thesaddle' and to which is secured a rack 27. A supplementary portion or table proper 31 is pivoted at32 to .ing member, a .hand operated Worm shaft 36 is secured to the lower member and meshes with a worm wheelsegment'37 secured to the upper member.

The head-stock F comprises a base 38 having alining lugs 39 and adapted to be secured in any desired longitudinal position on the table by means of bolts entering the slots in the latter. An angle block 40 is pivotally supported upon the base 38 and provides anindex point 40 adapted to cooperate with graduations 41 on the base .so I that it may be brought into any predetermined angular relation with said base.

At right angles to the plane of the supporting bearing face of the angle block 40- is a second face 42 upon which pivotally rests a head 43 in which is journaled a spindie 44 which supports the work on centers or by means of collet-chucks or otherwise. This head 43 preferably provides seats 45 to which the universal tooth rest may be secured in the same manner as in the case va small screw projecting from its periphery into engagement with the spindle 44, may be caused to be locked to said spindle, but when it is desired to rotate work about a dead center, it may be released. Either on this polley or on an integral portion of the spindle 44 are graduations 47 cooperating with a corresponding indicator line 48 on the head 43 so that the spindle or the work positioned by the pulley 46 maybe rotated through a definite angle. These 'graduations are preferably. arranged on the pulley, however, sinceby means of-suitable clamps or dogs 49 the work may be mounted on dead centers. and turned-through a definite angle without. requiring rotation of the spindle 44-. The oflice of this graduated spindle or actuating pulley is to serve as a means instrumental in greatly reducing the time and di T'- culty required for sharpening the peripheral edges of the teeth of a cutter to secure the correct clearance angle. To. accomplish this by the herein disclosed mechanism, it is exccedingly simple, since it is only necessary first to bring the radius line passing through a peripheral tip of one tooth into a position horizontally at right angles with the grinding surface of the wheel. then rotate the work exactly through the clearance angle reby the graduations, then adjust the tooth rest on the table to maintain this position for each tooth. in succession, and then feed the cutter in the usual manner in relation with the grinding wheel. T he correct grinding angle will then be secured,

Without further elaboration, the foregoing will so fully reveal the gist of this invention that others can by applying current knowledge readily adapt it for various applications without omitting certain :tcatures that, from the standpoint of the prior art, fairly constitute essential characteristics of the g nerir or specific aspects of this invention, 2 l "531 ierefore such adaptations should and are intended to be comprehended within the meaning and range of equivalency of the following claims.

Having thus revealed my invention, ll claim as new and desire to secure by Letters Patent of the United-States:-

1. A machine of the nature disclosed com bining a column, a knee vertically movable thereon and having a slide-way directed toward said column, a saddle vertically movable with said knee and horizontally slidable on said knee toward said column, and having a depending bracket vertically movable therewith, a table slidable on said saddle transversely to said knee slide-way, a transmission extending from the lower end of said bracket adapted to actuate said table, and a horizontally movable lever pivotally supported at the lower end of said bracket and operative to impart motion to said table through said transmission. I

2. A machine of the nature disclosed com bining a column, a knee vertically movable thereon, a saddle vertically movable with said knee and horizontally slidable on said knee and having a depending bracket vertically movable therewith, a table slidable on said saddle transversely to its moven'ient on said knee, a sh t vertically extending from the lower end said bracket into operative eugagei'uent with said. it ole, and a horixontally swinging lever operatively con nected with the lower end of said shaft to enable it to be actuated. to reciprocate said table.

3. A machine of the nature disclosed combining a coluimi, a knee vertically movable thereon, a saddle vertically movable with said knee and horizontally slidable on said knee and having a. bracket vertically movable therewith depending at one side of said knee, a table ti'ansversoly slidable on said saddle, a sh aft vertically extending through said bracket and o]' eratively connected with said table, a gear fined to the lower end of said shaft, and a horizontally extending lever pivoted at one end to the lower end of said bracket and providing a gear segment meshing with saidgear whereby upon horizontally swinging said lever the table will be reciprocated.

l. A machine of the nature disclosed combining a column, a knee vertically movable thereon, an elongated bifurcated saddle vertically movable with said knee and horizontally slidable on said knee and straddling said column, a bracket depending from one side of said saddle and movable as a unit therewith, an elongated table slidable on said saddle transversely thereto, a shaft vertically supported by said bracket and operatively connected at its upper end with said table, and lever mechanism supported by the lower end of said bracket and operative to rock said shaft.

5. A machine of the nature disclosed combining a cylindrical member providing in its periphery a channel extending in parallelism with the axis of said member, said channel having diverging side walls; a second member in close fitting relation with the periphery of said first member and movable axially relatively thereto; a conical roller carried by said second member and extending into said channel; and means for adj usting the roller radially to take up backlash,

between said two members.

(3. A grinding machine of the nature revealed combininga post; a tubular sleeve concentric therewith; aknee having a portion circumscribing said sleeve; and-means for splining said sleeve and knee together to permit axial movement but prevent rotary movement therebetween, said means being adjustable to take up wear and eliminate backlash.

7. A machine of the nature disclosed combiuing a column; a knee vertically movable thereon and having a horizontal slide-way; a saddle guided by said slide-Way and carried by said knee; a lever located lower than said saddle but mounted to be supported thereby; a table slidably mounted on the upper portion of said saddle; a transmission extending from said lever and operatively connected with said table; and adjustable means enabling said lever to be secured in different positions in its horizontal plane to enable said lever to be accommodated to differentpositions of an operator.

in witness whereof, I hereunto subscribe my name, as attested by the two subscribing w i tnesses ADOLPH L. DE LEEUVV. W itnesses ALnnn'r l NATHAN, OLIVER B. KAISER. 

